<h2>京东搜索</h2>
<div class="search">
  <input type="text" [(ngModel)]="keyword"/>
  <button (click)="doSearch()">搜索</button>
  <hr>
  <ul>
    <li *ngFor="let item of historyList;let key=index;">{{item}}   ------
      <button (click)="deleteHistroy(key)">X</button>
    </li>
  </ul>
</div>
